Swift - NSURLSession for Windows Authentication - ios

Question

I have this class here and inside the class is a method and I am trying to do an NSURLSession on an API that requires windows authentication username and password. I have followed the tutorial here https://gist.github.com/n8armstrong/5c5c828f1b82b0315e24
and came up with this:
let webservice = "https://api.com"
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let urlSession = NSURLSession(configuration: config)
class WebService: NSObject {
func loginUser(username: String, password: String) -> Bool {
let userPasswordString = "username#domain.com:Password"
let userPasswordData = userPasswordString.dataUsingEncoding(NSUTF8StringEncoding)
let base64EncodedCredential = userPasswordData!.base64EncodedStringWithOptions([])
let authString = "Basic \(base64EncodedCredential)"
config.HTTPAdditionalHeaders = ["Authorization" : authString]
let requestString = NSString(format:"%#", webservice) as String
let url: NSURL! = NSURL(string: requestString)
let task = urlSession.dataTaskWithURL(url) {
(let data, let response, let error) in
if (response as? NSHTTPURLResponse) != nil {
let dataString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print(dataString)
}
}
task.resume()
return true
}
}
but when I run this I get a 401 error: 401 - Unauthorized: Access is denied due to invalid credentials.
I have confirmed the URL to the API is correct. Same with the username and password. What am I doing wrong?

Answer 1

I was able to fix this by doing the following:
var credential: NSURLCredential!
func loginUser(username: String, password: String) -> Bool {
let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration, delegate: self, delegateQueue: nil)
credential = NSURLCredential(user:username, password:password, persistence: .ForSession)
let requestString = NSString(format:"%#", webservice) as String
let url: NSURL! = NSURL(string: requestString)
let task = session.dataTaskWithURL(url, completionHandler: {
data, response, error in
dispatch_async(dispatch_get_main_queue(),
{
if(error == nil)
{
print("Yay!")
}
else
{
print("Naw!")
}
})
})
task.resume()
return true
}
and then adding NSURLSessionDelegate methods:
func URLSession(session: NSURLSession, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) {
if challenge.previousFailureCount > 0
{
completionHandler(NSURLSessionAuthChallengeDisposition.CancelAuthenticationChallenge, nil)
}
else
{
completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential, NSURLCredential(forTrust:challenge.protectionSpace.serverTrust!))
}
}
func URLSession(session: NSURLSession, task: NSURLSessionTask, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void) {
completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential,credential)
}